Zero-Backlash Magnetic Ball Joint Rod Ends

These are designed to work with 3/8" balls, 0.230" diameter carbon fiber rods, and N50 cylindrical magnets which are 10mm in diameter and 15m high.
Description
This can be printed with a layer height of 0.2mm or 0.1mm. I use 0.2mm.

Use a shell thickness of 2mm or four layers, so that all of the walls will be printed with concentric circles, instead of back-and-forth infill.

I use a 3/8" ball end mill to gently clean out the ball bearing sockets.

Note: I have to print out tw